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THE POPULAR SCIENCE MONTHLY

and around irregular cliffs, simply to find in a crack some ground for anchorage (Fig. 3).

From a technical standpoint also the cell structure of trees and other plants must be considered as a wonderful manifestation of the resources of nature.[1]

PSM V79 D456 Tree roots resisting lateral forces.png

Fig. 2.

In this respect, the stalk of a rye-plant may be mentioned as a typical example. This plant meets the same requirements that are

  1. Schwender, "Mechanische Probleme der Botanik," Leipzig, 1909.